convert improper subtitles to heads
convert improper subtitles to heads

and decrease :skip-test,
improve layout and highlight
MasterDuke17/doc,gfldex/doc,antquinonez/doc,antquinonez/doc,MasterDuke17/doc,stmuk/doc,perl6/doc,dmaestro/doc,antquinonez/doc,antquinonez/doc,gfldex/doc,tbrowder/doc,jonathanstowe/doc,stmuk/doc,stmuk/doc,gfldex/doc,tbrowder/doc,jonathanstowe/doc,stmuk/doc,dmaestro/doc,perl6/doc,gfldex/doc,stmuk/doc,tbrowder/doc,jonathanstowe/doc,perl6/doc,perl6/doc,dmaestro/doc,tbrowder/doc,perl6/doc,gfldex/doc,antquinonez/doc,MasterDuke17/doc,jonathanstowe/doc,dmaestro/doc,MasterDuke17/doc,dmaestro/doc,jonathanstowe/doc